Hydraulic Heave Failure Mitigation Approach for the construction of the Deepest Metro Ventilation and Egress Shaft in India

Dr. Lakshmana Rao Mantri, Assistant General Manager (Designs), and Satya Narayan Kunwar, Project Manager, AFCONS Infrastructure Ltd. , discuss the design and construction challenges of constructing India’s deepest underground metro ventilation and escape shaft, how the issues were addressed, and the preemptive and mitigation measures taken.
East West Kolkata Metro has bagged national and international accolades by constructing India’s first under water twin rail transportation tunnel including the deepest underground metro station of India – the Howrah Metro station, surpassing the Hauz Khas station and Chawri Bazaar station in Delhi. Kolkata East West Metro Project has also added another feather in its cap by constructing India’s deepest metro ventilation cum egress shaft very close to the east bank of the Hooghly River.